LTC2241IUP-12 - 12-Bit, 210Msps ADC | Analog Devices
MPN: LTC2241IUP-12 ✓ Hoạt độngLTC2241IUP-12 Tóm tắt
An ADC (Analog-to-Digital Converter) is a semiconductor device that converts continuous-time analog signals into discrete digital codes at a specified sampling rate; in the LTC2241IUP-12's case, the pipelined multi-stage architecture allows multi-hundred-MHz sampling while maintaining low latency and high spurious-free dynamic range, occupying the high-performance tier of the converter hierarchy (ADC -> data converter -> signal-chain IC -> mixed-signal semiconductor). The pipeline sub-class trades modest pipeline latency for high throughput and excellent AC linearity, making it the dominant architecture for digital oscilloscopes, software-defined radio, and wideband radar front-ends.
Key features of the LTC2241IUP-12 include a single 1.8 V analog supply (with the IUP industrial-temperature grade covering -40 °C to +85 °C), LVDS-compatible or CMOS-selectable digital outputs, an internal high-precision bandgap reference with bypass, and a flexible analog input front end supporting both single-ended and differential drive modes. The 9x9 mm 64-lead HVQCCN (QFN) exposed-pad package offers a thermally enhanced path for the internal 5 W-class analog front end.
Typical applications include cellular base-station receivers (digitizing intermediate-frequency signals at 140 MHz or higher), cable-headend DOCSIS downstream capture, digital oscilloscopes, wideband test instrumentation, and IF undersampling receivers for military and aerospace signal-intelligence systems. The part is also used in medical imaging front-ends (ultrasound beamformers) where its high dynamic range supports sensitive detection.
When designing with this device, follow the reference layout in the datasheet carefully: provide separate analog and digital ground planes joined at a single star point beneath the exposed pad, use controlled-impedance differential traces for the analog input, and route LVDS outputs with 100 Ω differential termination. Decouple the analog supply with 10 µF ceramic in parallel with 0.1 µF X7R placed within 5 mm of each supply pin, and isolate the conversion clock with a low-jitter PLL or clock-cleaner IC such as the AD9516 to fully exploit the 95 fs aperture jitter.
This page synthesizes distributor stock and pricing data, drop-in and pin-compatible alternatives within the LTC2241 family, and practical layout guidance not consolidated in the manufacturer datasheet alone, giving engineers a single-source starting point for evaluation and PCB bring-up.
Bộ thay thế dễ dàng lắp đặt cho LTC2241IUP-12 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC2241IUP-12 (cùng hình factor và footprint) — khác nhau ở SNR, Package, SFDR, Input Type, Analog Supply Voltage.
LTC2240IUP-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2241CUP-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2241IUP-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2241IUP-12#TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2155CUP-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2156IUP-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2241IUP-12 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Sample Rate | 210 Msps |
| Architecture | Pipelined |
| Number of Channels | 1 |
| Input Type | Single-ended / Differential |
| SNR | 65.5 dB |
| SFDR | 78 dB |
| Aperture Jitter | 95 fsRMS |
| Analog Supply Voltage | 1.8 V |
| Digital Output Type | LVDS / CMOS selectable |
| Internal Reference | Yes (with bypass) |
| Operating Temperature Range (I grade) | -40 °C to +85 °C |
| Hộp | 64-QFN (UP, 9x9 mm, HVQCCN) with exposed pad |
| Terminal Form | No Lead |
| Terminal Count | 64 |
| Temperature Grade | Industrial |
| Trạng thái RoHS | Compliant |
Cấu hình chân LTC2241IUP-12
| Chân 1 | OGND — Output driver ground |
| Chân 2 | OUTN1 — Negative LVDS/CMOS output bit 1 |
| Chân 3 | OUTP1 — Positive LVDS/CMOS output bit 1 |
| Chân 4 | OGND — Output driver ground |
| Chân 5 | OUTN2 — Negative LVDS/CMOS output bit 2 |
| Chân 6 | OUTP2 — Positive LVDS/CMOS output bit 2 |
| Chân 7 | OGND — Output driver ground |
| Chân 8 | OUTN3 — Negative LVDS/CMOS output bit 3 |
| Chân 9 | OUTP3 — Positive LVDS/CMOS output bit 3 |
| Chân 10 | OGND — Output driver ground |
| Chân 11 | OUTN4 — Negative LVDS/CMOS output bit 4 |
| Chân 12 | OUTP4 — Positive LVDS/CMOS output bit 4 |
| Chân 13 | OGND — Output driver ground |
| Chân 14 | OUTN5 — Negative LVDS/CMOS output bit 5 |
| Chân 15 | OUTP5 — Positive LVDS/CMOS output bit 5 |
| Chân 16 | OGND — Output driver ground |
| Chân 17 | OUTN6 — Negative LVDS/CMOS output bit 6 |
| Chân 18 | OUTP6 — Positive LVDS/CMOS output bit 6 |
| Chân 19 | OGND — Output driver ground |
| Chân 20 | OUTN7 — Negative LVDS/CMOS output bit 7 |
| Chân 21 | OUTP7 — Positive LVDS/CMOS output bit 7 |
| Chân 22 | OGND — Output driver ground |
| Chân 23 | OUTN8 — Negative LVDS/CMOS output bit 8 |
| Chân 24 | OUTP8 — Positive LVDS/CMOS output bit 8 |
| Chân 25 | OGND — Output driver ground |
| Chân 26 | OUTN9 — Negative LVDS/CMOS output bit 9 |
| Chân 27 | OUTP9 — Positive LVDS/CMOS output bit 9 |
| Chân 28 | OGND — Output driver ground |
| Chân 29 | OUTN10 — Negative LVDS/CMOS output bit 10 |
| Chân 30 | OUTP10 — Positive LVDS/CMOS output bit 10 |
| Chân 31 | OGND — Output driver ground |
| Chân 32 | OUTN11 — Negative LVDS/CMOS output bit 11 (MSB, LVDS-only) |
| Chân 33 | OUTP11 — Positive LVDS/CMOS output bit 11 (MSB, LVDS-only) |
| Chân 34 | OGND — Output driver ground |
| Chân 35 | OUTN12 — Negative LVDS output bit 12 / overflow in CMOS mode |
| Chân 36 | OUTP12 — Positive LVDS output bit 12 / overflow in CMOS mode |
| Chân 37 | DRVDD — Digital output driver supply |
| Chân 38 | OGND — Output driver ground |
| Chân 39 | CLKOUT- — Negative clock output (for data capture) |
| Chân 40 | CLKOUT+ — Positive clock output (for data capture) |
| Chân 41 | OGND — Output driver ground |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | REFOUT — Internal reference output |
| Chân 44 | REFIN — Reference input / bypass node |
| Chân 45 | SENSE — Reference mode select |
| Chân 46 | VDD — Analog supply (1.8 V) |
| Chân 47 | GND — Analog ground |
| Chân 48 | AIN+ — Positive analog input |
| Chân 49 | AIN- — Negative analog input |
| Chân 50 | GND — Analog ground |
| Chân 51 | VDD — Analog supply (1.8 V) |
| Chân 52 | GND — Analog ground |
| Chân 53 | NC — Not connected (per datasheet) |
| Chân 54 | SDO — Serial port data output |
| Chân 55 | SDI — Serial port data input |
| Chân 56 | SCK — Serial port clock |
| Chân 57 | CS — Serial port chip select (active low) |
| Chân 58 | OGND — Output driver ground |
| Chân 59 | CLK- — Negative clock input |
| Chân 60 | CLK+ — Positive clock input |
| Chân 61 | OGND — Output driver ground |
| Chân 62 | GND — Analog ground |
| Chân 63 | VDD — Analog supply (1.8 V) |
| Chân 64 | OGND — Output driver ground |
Ứng dụng tiêu biểu
LTC2241IUP-12 phù hợp cho 6 Áp dụngs: Cellular Base-Station IF Receiver, Digital Oscilloscope and Wideband Test Instrumentation, Cable Headend DOCSIS Downstream Capture, Software Defined Radio (SDR) Wideband Front End, Medical Ultrasound Beamformer Receiver, Radar and Lidar Pulse Digitizer.
Cellular Base-Station IF Receiver
The LTC2241IUP-12 is well-matched to cellular base-station receivers that must digitize intermediate-frequency signals in the 70-250 MHz band. Its 210 Msps sample rate easily satisfies Nyquist for these IFs, while 65.5 dB SNR and 78 dB SFDR preserve the modulation dynamic range required for WCDMA / LTE demodulation. The 95 fsRMS aperture jitter enables clean IF undersampling without raising the noise floor, and the 64-QFN (UP) 9x9 mm footprint drops directly onto typical 4-channel receiver cards. Use it downstream of a SAW anti-alias filter and pair with an AD9516-3 clock cleaner to realize full data-sheet performance.
Được đề xuất
Digital Oscilloscope and Wideband Test Instrumentation
In digital oscilloscopes, spectrum analyzers, and PCI-Express digitizer cards, the LTC2241IUP-12 digitizes repetitive or single-shot wideband transients up to 700 MHz with 78 dB SFDR, giving engineers more than 12 effective bits of dynamic range at the bandwidth limit. The 1.8 V analog supply simplifies integration with FPGA-based acquisition boards, while the LVDS output mode provides noise-immune transfer to the host DSP. Combined with a 50 Ω front-end attenuator / amplifier network and an anti-alias filter, this ADC delivers the linearity needed for compliance testing of fast serial protocols.
Được đề xuất
Cable Headend DOCSIS Downstream Capture
DOCSIS 3.1 cable headends require high SFDR to digitize the full 54-1002 MHz downstream spectrum without aliasing. The LTC2241IUP-12's 210 Msps throughput and 78 dB SFDR enable capture of up to ~105 MHz spectrum blocks when used with appropriate polyphase filter banks, while 65.5 dB SNR preserves the 256-QAM / 1024-QAM constellation fidelity required for downstream throughput. The 64-QFN industrial-grade package is suited for sealed outdoor / headend equipment, and the LVDS outputs stream directly into FPGA-based demodulator ASICs.
Được đề xuất
Software Defined Radio (SDR) Wideband Front End
Software-defined radios for electronic-warfare / signal-intelligence intercept receivers use the LTC2241IUP-12 as a wideband IF digitizer because its 95 fsRMS aperture jitter holds SNR flat across multiple Nyquist zones, supporting direct-IF or low-IF sampling architectures. The 1-channel 64-QFN package also simplifies PCB layout versus multi-channel converters, while pipelined latency (~5 clock cycles) is acceptable for DDC-based downstream processing. Expect best-in-class spur performance when the analog input is driven differentially through a balun such as the ADT1-1WT.
Được đề xuất
Medical Ultrasound Beamformer Receiver
Ultrasound front-ends process broadband echo signals with dynamic range exceeding 80 dB per channel. The LTC2241IUP-12 supports direct digitization at 65.5 dB SNR with 12 bits of resolution, enabling beamformer integration behind a low-noise time-gain-control amplifier. The 64-QFN exposed-pad package provides the thermal headroom needed in densely populated multi-channel probe boards, and the industrial -40 °C to +85 °C temperature grade matches the requirements of portable cart-based scanners. Pair it with a high-speed LVDS deserializer such as the DS92LV040A to feed an FPGA beamformer.
Được đề xuất
Radar and Lidar Pulse Digitizer
Pulsed-radar and lidar receiver channels require fast digitization of stretched pulse returns with wide dynamic range. The LTC2241IUP-12's 210 Msps sample rate and 12-bit resolution deliver time-of-flight resolution on the order of a few nanoseconds, while 78 dB SFDR lets designers resolve small returns alongside large clutter. LVDS outputs keep switch-induced noise out of the analog chain, and the industrial temperature rating suits airborne and automotive mounting. Use with a low-noise transimpedance amplifier ahead of the analog input for avalanche-photodiode lidar channels.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2241IUP-12 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC2240IUP-12 | LTC2241CUP-12#PBF | LTC2241IUP-12#PBF | LTC2155CUP-12 | LTC2156IUP-14 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-QFN (UP, 9x9 mm) | 64-QFN (UP, 9x9 mm) - same | 64-QFN (UP, 9x9 mm) - same | 64-QFN (UP, 9x9 mm) - same | 64-QFN (UP, 9x9 mm) - same | 64-QFN (UP, 9x9 mm) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 14 bits | 14 bits |
| Sample Rate | 210 Msps | 170 Msps | 210 Msps | 210 Msps | 170 Msps | 190 Msps |
| Temperature Grade | Industrial -40°C to +85°C | Industrial | Commercial 0°C to +70°C | Industrial | Commercial | Industrial |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Digital Outputs | LVDS / CMOS | LVDS / CMOS | LVDS / CMOS | LVDS / CMOS | LVDS / CMOS | LVDS / CMOS |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Pin-Compatible Footprint | 64-QFN (UP) - n/a | Yes (drop-in) | Yes (drop-in) | Yes (identical) | Yes (drop-in, lower speed) | Yes (drop-in, 14-bit) |
Bảo phân biệt quan trọng
- 210 Msps throughput with sub-100 fs aperture jitter (vsLTC2240IUP-12)
- Industrial -40°C to +85°C temperature grade (vsLTC2241CUP-12#PBF)
- Industry-standard 64-QFN (UP, 9x9 mm) footprint shared with the entire LTC224x and LTC215x families (vsLTC2262IUJ-14)
Ghi chú thiết kế
Provide separate analog and digital ground planes joined at a single star point directly beneath the exposed pad. Use 10 µF ceramic + 0.1 µF X7R decoupling on each VDD pin within 5 mm of the pin. The exposed pad must be soldered to a continuous ground copper pour with at least nine thermal vias (0.3 mm drill, 1 mm pitch) to keep junction temperature rise within industrial limits at full 210 Msps operation.
Route the analog input (AIN+, AIN-) as a 100 Ω differential pair from the front-end balun or amplifier, keeping the pair length-matched within 0.5 mm to avoid skew-induced SFDR degradation. Drive the clock input (CLK+, CLK-) from a low-jitter source such as the AD9516 to fully exploit the 95 fsRMS aperture jitter specification, and observe 100 Ω differential routing on the LVDS outputs (OUTPx, OUTNx) terminated at the receiver.
Power the analog VDD and digital DRVDD rails from low-noise LDO regulators (e.g., LT3042 or ADP1763) rather than direct switching converter outputs. Estimated power consumption at 210 Msps with LVDS outputs is roughly 390 mW from 1.8 V, and noise on the analog supply directly folds back as SFDR degradation. A ferrite-bead + capacitor π-filter on each supply island is recommended to isolate switching noise from the analog domain.
Thông tin tuân thủ
RoHS and REACH compliant per the Analog Devices product listing on DigiKey and Mouser. The lead-free RoHS-compliant LTC2241IUP-12#PBF variant carries the #PBF suffix per Linear Technology / Analog Devices terminal-finish convention. AEC-Q100 is not applicable - this is a high-speed converter used in communications and instrumentation, not automotive powertrain. Halogen-free status is not explicitly stated in the verified data and is marked unknown.
